diff --git a/pandas/tests/frame/test_repr.py b/pandas/tests/frame/test_repr.py
index 24aeb0e27c87c..cb6713ae0f73c 100644
--- a/pandas/tests/frame/test_repr.py
+++ b/pandas/tests/frame/test_repr.py
@@ -12,6 +12,7 @@
     Categorical,
     CategoricalIndex,
     DataFrame,
+    IntervalIndex,
     MultiIndex,
     NaT,
     PeriodIndex,
@@ -307,6 +308,21 @@ def test_latex_repr(self):
         # GH 12182
         assert df._repr_latex_() is None
 
+    def test_repr_with_datetimeindex(self):
+        df = DataFrame({"A": [1, 2, 3]}, index=date_range("2000", periods=3))
+        result = repr(df)
+        expected = "            A\n2000-01-01  1\n2000-01-02  2\n2000-01-03  3"
+        assert result == expected
+
+    def test_repr_with_intervalindex(self):
+        # https://github.com/pandas-dev/pandas/pull/24134/files
+        df = DataFrame(
+            {"A": [1, 2, 3, 4]}, index=IntervalIndex.from_breaks([0, 1, 2, 3, 4])
+        )
+        result = repr(df)
+        expected = "        A\n(0, 1]  1\n(1, 2]  2\n(2, 3]  3\n(3, 4]  4"
+        assert result == expected
+
     def test_repr_with_categorical_index(self):
         df = DataFrame({"A": [1, 2, 3]}, index=CategoricalIndex(["a", "b", "c"]))
         result = repr(df)
diff --git a/pandas/tests/indexes/interval/test_formats.py b/pandas/tests/indexes/interval/test_formats.py
index d080516917892..bf335d154e186 100644
--- a/pandas/tests/indexes/interval/test_formats.py
+++ b/pandas/tests/indexes/interval/test_formats.py
@@ -14,15 +14,7 @@
 
 
 class TestIntervalIndexRendering:
-    def test_frame_repr(self):
-        # https://github.com/pandas-dev/pandas/pull/24134/files
-        df = DataFrame(
-            {"A": [1, 2, 3, 4]}, index=IntervalIndex.from_breaks([0, 1, 2, 3, 4])
-        )
-        result = repr(df)
-        expected = "        A\n(0, 1]  1\n(1, 2]  2\n(2, 3]  3\n(3, 4]  4"
-        assert result == expected
-
+    # TODO: this is a test for DataFrame/Series, not IntervalIndex
     @pytest.mark.parametrize(
         "constructor,expected",
         [
diff --git a/pandas/tests/indexes/period/test_formats.py b/pandas/tests/indexes/period/test_formats.py
index 888d814ac7eea..81c79f7d18f2f 100644
--- a/pandas/tests/indexes/period/test_formats.py
+++ b/pandas/tests/indexes/period/test_formats.py
@@ -65,12 +65,6 @@ def test_format_empty(self):
         with tm.assert_produces_warning(FutureWarning, match=msg):
             assert empty_idx.format(name=True) == [""]
 
-    def test_frame_repr(self):
-        df = pd.DataFrame({"A": [1, 2, 3]}, index=pd.date_range("2000", periods=3))
-        result = repr(df)
-        expected = "            A\n2000-01-01  1\n2000-01-02  2\n2000-01-03  3"
-        assert result == expected
-
     @pytest.mark.parametrize("method", ["__repr__", "__str__"])
     def test_representation(self, method):
         # GH#7601
@@ -118,6 +112,7 @@ def test_representation(self, method):
             result = getattr(idx, method)()
             assert result == expected
 
+    # TODO: These are Series.__repr__ tests
     def test_representation_to_series(self):
         # GH#10971
         idx1 = PeriodIndex([], freq="D")
diff --git a/pandas/tests/indexes/timedeltas/test_formats.py b/pandas/tests/indexes/timedeltas/test_formats.py
index ee090bd0aaf0a..607336060cbbc 100644
--- a/pandas/tests/indexes/timedeltas/test_formats.py
+++ b/pandas/tests/indexes/timedeltas/test_formats.py
@@ -51,6 +51,7 @@ def test_representation(self, method):
                 result = getattr(idx, method)()
                 assert result == expected
 
+    # TODO: this is a Series.__repr__ test
     def test_representation_to_series(self):
         idx1 = TimedeltaIndex([], freq="D")
         idx2 = TimedeltaIndex(["1 days"], freq="D")